For example, on WJEC C4 June 2005, 4b. it does not say that you must answer by using Rsin.
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How do you tell when to use Rsin/Rcos formulas? watch
- Thread Starter
- 12-06-2016 19:46
- 12-06-2016 21:58
When you have an expression like cosx-3sinx=2
It may seem difficult to solve if you try any other method. You are basically converting expressions with sines and cosines into a single trig expression.